Lochinvar & A.O. Smith 100173798 Assembly
The Lochinvar & A.O. Smith 100173798 Assembly is a critical combustion component engineered specifically for Knight XL boiler models KBN600 through KBN800. This factory-spec gas/air arm assembly is designed to manage the high-precision mixing of fuel and combustion air, supporting the unit’s 94.6% thermal efficiency and 5:1 modulation capabilities. As a core part of the boiler's negative regulation (Neg/Reg) technology, this assembly ensures the fan speed and gas flow remain perfectly synchronized across the entire firing range, even with supply gas pressures as low as 4 inches water column.
For contractors performing boiler maintenance or addressing blocked flue conditions, the 100173798 comes as a complete gas/air assembly w/ gasket to maintain a pressure-tight seal at the heat exchanger interface. This is a direct replacement for the legacy WTR3085 part number, built to withstand the demanding Category IV venting environments typical of high-efficiency commercial condensing systems. Ensuring the integrity of this assembly is vital for preventing low-NOx emission failures and maintaining the SMART SYSTEM™ control parameters for optimal heater performance.
Key Benefits- Precise Fuel-to-Air Ratio: Maintains combustion efficiency and stable flame signals across all firing rates.
- Direct OEM Fit: Drop-in replacement for Lochinvar Knight XL KBN600, KBN701, and KBN801 series.
- Redesigned Seal: Includes the essential gasket to prevent exhaust gas leakage into the cabinet.
- Versatile Compatibility: Engineered for both natural gas and propane configurations with original Neg/Reg technology.
Which boiler models use the 100173798 assembly?
This specific part is high-capacity and serves Lochinvar Knight XL models KBN600, KBN701, and KBN801. It is not interchangeable with the smaller KBN400/501 versions.
Does this gas/air assembly include the mounting gasket?
Yes, this replacement gas air assembly comes with the required high-temp gasket to ensure a safe, airtight connection to the heat exchanger access door.
Can this part fix "Low Flame" or "Ignition Failure" errors?
If your HVAC technician diagnoses a lean mixture or restricted airflow within the mixing arm, replacing this assembly often restores the proper fuel-air mix required for reliable ignition.
This item is not eligible for free shipping.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
Original: $490.55
-65%$490.55
$171.69Lochinvar & A.O. Smith 100173798 Assembly
The Lochinvar & A.O. Smith 100173798 Assembly is a critical combustion component engineered specifically for Knight XL boiler models KBN600 through KBN800. This factory-spec gas/air arm assembly is designed to manage the high-precision mixing of fuel and combustion air, supporting the unit’s 94.6% thermal efficiency and 5:1 modulation capabilities. As a core part of the boiler's negative regulation (Neg/Reg) technology, this assembly ensures the fan speed and gas flow remain perfectly synchronized across the entire firing range, even with supply gas pressures as low as 4 inches water column.
For contractors performing boiler maintenance or addressing blocked flue conditions, the 100173798 comes as a complete gas/air assembly w/ gasket to maintain a pressure-tight seal at the heat exchanger interface. This is a direct replacement for the legacy WTR3085 part number, built to withstand the demanding Category IV venting environments typical of high-efficiency commercial condensing systems. Ensuring the integrity of this assembly is vital for preventing low-NOx emission failures and maintaining the SMART SYSTEM™ control parameters for optimal heater performance.
Key Benefits- Precise Fuel-to-Air Ratio: Maintains combustion efficiency and stable flame signals across all firing rates.
- Direct OEM Fit: Drop-in replacement for Lochinvar Knight XL KBN600, KBN701, and KBN801 series.
- Redesigned Seal: Includes the essential gasket to prevent exhaust gas leakage into the cabinet.
- Versatile Compatibility: Engineered for both natural gas and propane configurations with original Neg/Reg technology.
Which boiler models use the 100173798 assembly?
This specific part is high-capacity and serves Lochinvar Knight XL models KBN600, KBN701, and KBN801. It is not interchangeable with the smaller KBN400/501 versions.
Does this gas/air assembly include the mounting gasket?
Yes, this replacement gas air assembly comes with the required high-temp gasket to ensure a safe, airtight connection to the heat exchanger access door.
Can this part fix "Low Flame" or "Ignition Failure" errors?
If your HVAC technician diagnoses a lean mixture or restricted airflow within the mixing arm, replacing this assembly often restores the proper fuel-air mix required for reliable ignition.
This item is not eligible for free shipping.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
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Description
The Lochinvar & A.O. Smith 100173798 Assembly is a critical combustion component engineered specifically for Knight XL boiler models KBN600 through KBN800. This factory-spec gas/air arm assembly is designed to manage the high-precision mixing of fuel and combustion air, supporting the unit’s 94.6% thermal efficiency and 5:1 modulation capabilities. As a core part of the boiler's negative regulation (Neg/Reg) technology, this assembly ensures the fan speed and gas flow remain perfectly synchronized across the entire firing range, even with supply gas pressures as low as 4 inches water column.
For contractors performing boiler maintenance or addressing blocked flue conditions, the 100173798 comes as a complete gas/air assembly w/ gasket to maintain a pressure-tight seal at the heat exchanger interface. This is a direct replacement for the legacy WTR3085 part number, built to withstand the demanding Category IV venting environments typical of high-efficiency commercial condensing systems. Ensuring the integrity of this assembly is vital for preventing low-NOx emission failures and maintaining the SMART SYSTEM™ control parameters for optimal heater performance.
Key Benefits- Precise Fuel-to-Air Ratio: Maintains combustion efficiency and stable flame signals across all firing rates.
- Direct OEM Fit: Drop-in replacement for Lochinvar Knight XL KBN600, KBN701, and KBN801 series.
- Redesigned Seal: Includes the essential gasket to prevent exhaust gas leakage into the cabinet.
- Versatile Compatibility: Engineered for both natural gas and propane configurations with original Neg/Reg technology.
Which boiler models use the 100173798 assembly?
This specific part is high-capacity and serves Lochinvar Knight XL models KBN600, KBN701, and KBN801. It is not interchangeable with the smaller KBN400/501 versions.
Does this gas/air assembly include the mounting gasket?
Yes, this replacement gas air assembly comes with the required high-temp gasket to ensure a safe, airtight connection to the heat exchanger access door.
Can this part fix "Low Flame" or "Ignition Failure" errors?
If your HVAC technician diagnoses a lean mixture or restricted airflow within the mixing arm, replacing this assembly often restores the proper fuel-air mix required for reliable ignition.
This item is not eligible for free shipping.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
